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Appraising Rubies

Appraising rubies is a skill every jeweler and gemologist needs to master. Learn about the different quality factors that can affect ruby prices.…

Sphalerite Buying Guide

Our sphalerite buying guide can help you learn how these gems are graded, what to avoid, and how to identify a high quality stone or a bargain in the…

Tips for Polishing Kunzite

Polishing kunzite can be very challenging, especially for novice gemstone faceters. Learn what tools and techniques work best.

Lapis Lazuli Buying Guide

Our lapis lazuli buying guide can help you learn how to grade these gems, what to avoid, and how to identify a high quality stone or a bargain in the…

Gemstones That Make Money

What kinds of gems can novice faceters cut to make a profit? Learn which gemstones make money reliably and which ones have limited potential.

Buying a Faceting Machine

Buying a faceting machine means making compromises between economy, looks, and technical features. Learn what questions to ask before you make…


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March Birthstone
The March birthstone is aquamarine. Famed for millennia for its pure and even blue or blue-green color, potentially large size, and sparkling clarity, the aquamarine has been a valued gem to many cultures. Aquamarine is a variety of the gem species beryl, making it a close cousin of emerald.
April Birthstone
April's birthstone is diamond. The vast majority of diamonds are transparent, colorless, and show an extraordinary display of well-defined white and multi-colored flashes. Rarely, diamonds also occur in a rainbow of exciting body colors.
July Birthstone
This vibrant red gemstone is the July birthstone and is closely associated with love, passion, and romance. While there are affordable options to be found, the largest and most beautifully colored rubies can be very expensive; the best rubies may be sold for the highest cost-per-carat costs of any colored gemstone.
August Birthstone
Peridot is the August birthstone. It is also sometimes called the “evening emerald” because of its unique capacity to sparkle under natural or artificial light. However, it should not be confused with emerald because peridot has its own distinct characteristics setting it apart from other gemstones.
September Birthstone
The September birthstone is sapphire. Sapphires are members of the gem species corundum. Depending on the exact chemistry of individual stones, sapphires may present a whole spectrum of colors with the exception of red. This is because red sapphires are put into their own category and called rubies.